I. pil ‧ low 1 /ˈpɪləʊ $ -loʊ/ BrE AmE noun [countable]
[ Language: Old English ; Origin: pyle , from Latin pulvinus ]
1 . a cloth bag filled with soft material that you put your head on when you are sleeping:
I’ll be asleep as soon as my head hits the pillow.
⇨ ↑ cushion 1 (1)
2 . pillow fight a game in which children hit each other with pillows
3 . pillow talk informal conversation between lovers in bed
II. pillow 2 BrE AmE verb [transitive always + adverb/preposition] literary
to rest your head somewhere:
His head was pillowed on his arm.